package com.nowcoder.community.util;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;

/**
 * 获取请求中的cookie，如果没有获取到cookie，返回null
 */
public class CookieUtil {
    public static String getValue(HttpServletRequest request, String name){

        if (request==null || name==null){
            throw new IllegalArgumentException("参数为空！");
        }

        Cookie[] cookies = request.getCookies();

        if (cookies != null){
            for (Cookie cookie : cookies) {
                if (cookie.getName().equals(name))
                    return cookie.getValue();
            }
        }

        return null;
    }
}
